Noun
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a straight sword with a narrow blade and two edges
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a narrow flattened pleat or fold that is stitched in place
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(sports) a bodily position adopted in some sports (such as diving or skiing) in which the knees are bent and the thighs are drawn close to the chest
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eatables (especially sweets)
Verb
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draw together into folds or puckers
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make a tuck or several folds in
"tuck the fabric"
"tuck in the sheet"
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fit snugly into
"insert your ticket into the slot"
"tuck your shirttail in"